Tiffany Hall of Johnson City, Tenn., has been on both sides of the glass in the neonatal intensive care unit — first as a nurse, then as a mother.

“I worked with the babies born into addiction. I knew what could happen. I knew what was going to happen," Hall says.

When a mother is on heroin, high-powered pain pills or even prescribed drugs meant to step down off opioids, her child can be born with a condition called neonatal abstinence syndrome. NAS continues to afflict more and more newborns in Tennessee, which has one of the highest rates in the country.